261560913486 has 16 divisors (see below), whose sum is σ = 537260255184. Its totient is φ = 84830566464.

The previous prime is 261560913457. The next prime is 261560913491. The reversal of 261560913486 is 684319065162.

It is a super-2 number, since 2×261560913486² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589100935 + ... + 589101378.

It is an arithmetic number, because the mean of its divisors is an integer number (33578765949).

Almost surely, 2^261560913486 is an apocalyptic number.

261560913486 is an abundant number, since it is smaller than the sum of its proper divisors (275699341698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261560913486 is a wasteful number, since it uses less digits than its factorization.

261560913486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178202355.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 261560913486 in words is "two hundred sixty-one billion, five hundred sixty million, nine hundred thirteen thousand, four hundred eighty-six".